That is why Dr Westman defines constipation...on LC we eat less bulk foods like whole grain breads and cereal, more nutrient dense foods, less food in volume overall, which all means less poo in volume and maybe less frequently. Also, enough salt is important to keep that water in all the right places, in including the bowels. http://forum.lowcarber.org/showthread.php?t=445775

All the best at your appointment tomorrow. I'm a ten year cancer survivor and switched to low carb seven years ago after reading Gary Taubes's Good Calories chapter on cancer. If you ever want to delve into some great articles and talks on nutrition and cancer, PM me your email.